private void GUIItem(ref ItemEnum item)
{
item.name = EditorGUILayout.TextField(item.name);
EditorGUILayout.Space(50.0f);
item.number = EditorGUILayout.IntField(item.number);
}
private void AddItem(Rect rect)
{
int count = _list.count;
ItemEnum newItem = new ItemEnum();
newItem.number = count == 0 ? 0 : _list[count - 1].number + 1;
newItem.name = "Item" + newItem.number;
_list.AddItem(newItem);
}